People stand during the national anthem during the 2012 Texas GOP Convention held at the Fort Worth Convention Center Saturday June 9, 2012 in Fort Worth, Texas.

People stand during the national anthem during the 2012 Texas GOP Convention held at the Fort Worth Convention Center Saturday June 9, 2012 in Fort Worth, Texas.

Photo: Edward A. Ornelas, San Antonio Express-News

People stand during the national anthem during the 2012 Texas GOP... Photo-3050086.44138 - Houston Chronicle

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Janet Staples and her husband Texas Agricultural Commissioner Todd Staples leave the stage after his speech during the 2012 Texas GOP Convention held at the Fort Worth Convention Center Saturday June 9, 2012 in Fort Worth, Texas. less

Janet Staples and her husband Texas Agricultural Commissioner Todd Staples leave the stage after his speech during the 2012 Texas GOP Convention held at the Fort Worth Convention Center Saturday June 9, 2012 in ... more

Heidi Cruz (left) and her husband U.S. Senate candidate Ted Cruz wave after his speech during the 2012 Texas GOP Convention held at the Fort Worth Convention Center Saturday June 9, 2012 in Fort Worth, Texas. Cruz and Texas Lt. Gov. David Dewhurst are in a runoff for U.S. Senate. less

Heidi Cruz (left) and her husband U.S. Senate candidate Ted Cruz wave after his speech during the 2012 Texas GOP Convention held at the Fort Worth Convention Center Saturday June 9, 2012 in Fort Worth, Texas. ... more

Eli Davis of Dallas Senate District 23 raises his convention credential as he votes for the new chairman during the Texas Democratic Convention at the George R. Brown Convention Saturday, June 9, 2012, in Houston. less

Eli Davis of Dallas Senate District 23 raises his convention credential as he votes for the new chairman during the Texas Democratic Convention at the George R. Brown Convention Saturday, June 9, 2012, in ... more

Political buttons shown at a booth during the Texas Democratic Convention at the George R. Brown Convention Saturday, June 9, 2012, in Houston.

Political buttons shown at a booth during the Texas Democratic Convention at the George R. Brown Convention Saturday, June 9, 2012, in Houston.

Photo: Melissa Phillip, Houston Chronicle

Political buttons shown at a booth during the Texas Democratic... Photo-3049049.44138 - Houston Chronicle

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Addie Sanders of Ft. Worth mans an information booth at the Texas Democratic Convention at the George R. Brown Convention Saturday, June 9, 2012, in Houston for her son, Kenneth Sanders, who is running for U. S. Congress in District 6. less

Addie Sanders of Ft. Worth mans an information booth at the Texas Democratic Convention at the George R. Brown Convention Saturday, June 9, 2012, in Houston for her son, Kenneth Sanders, who is running for U. ... more

Joaquin Castro left, introduces his twin brother and San Antonio Mayor Julian Castro during the the 2012 Texas Democratic Party State Convention at the George R. Brown Convention Center Friday, June 8, 2012, in Houston. less

Joaquin Castro left, introduces his twin brother and San Antonio Mayor Julian Castro during the the 2012 Texas Democratic Party State Convention at the George R. Brown Convention Center Friday, June 8, 2012, in ... more

Democratic Congressional Candidate Joaquin Castro speaks prior to introducing his twin brother and San Antonio Mayor Julian Castro during the the 2012 Texas Democratic Party State Convention at the George R. Brown Convention Center Friday, June 8, 2012, in Houston. less

Democratic Congressional Candidate Joaquin Castro speaks prior to introducing his twin brother and San Antonio Mayor Julian Castro during the the 2012 Texas Democratic Party State Convention at the George R. ... more

Former presidential candidate Rick Santorum, center, greets Louie Gohmert, center left, during Gala Banquet of the Republican Party of Texas State Convention at the Fort Worth Convention Center in Fort Worth, TX on June 8, 2012. less

Former presidential candidate Rick Santorum, center, greets Louie Gohmert, center left, during Gala Banquet of the Republican Party of Texas State Convention at the Fort Worth Convention Center in Fort Worth, ... more

Texas State Rep. Joaquin Castro, front, gestures toward his brother, San Antonio Mayor Julian Castro, while addressing a news conference during the 2012 Texas Democratic Party State Convention at the George R. Brown Convention Center in Houston on Friday, June 8, 2012. less

Texas State Rep. Joaquin Castro, front, gestures toward his brother, San Antonio Mayor Julian Castro, while addressing a news conference during the 2012 Texas Democratic Party State Convention at the George R. ... more

A convention delegate passes by as San Antonio Mayor Julian Castro, top left, is interviewed by television reporter Karina Kling of YNN during the 2012 Texas Democratic Party State Convention at the George R. Brown Convention Center in Houston on Friday, June 8, 2012. less

A convention delegate passes by as San Antonio Mayor Julian Castro, top left, is interviewed by television reporter Karina Kling of YNN during the 2012 Texas Democratic Party State Convention at the George R. ... more

Doris Lewis of Dallas wears red, white and blue decorations on her head as she laughs with other guests outside the Black Caucus meeting during the 2012 Texas Democratic Party State Convention at the George R. Brown Convention Center in Houston on Friday, June 8, 2012. less

Doris Lewis of Dallas wears red, white and blue decorations on her head as she laughs with other guests outside the Black Caucus meeting during the 2012 Texas Democratic Party State Convention at the George R. ... more

Texas State Rep. Joaquin Castro, left, laughs with Choco Meza, chairwoman of the Bexar County Democratic Party, during the 2012 Texas Democratic Party State Convention at the George R. Brown Convention Center in Houston on Friday, June 8, 2012. less

Texas State Rep. Joaquin Castro, left, laughs with Choco Meza, chairwoman of the Bexar County Democratic Party, during the 2012 Texas Democratic Party State Convention at the George R. Brown Convention Center ... more

Verna Blackwell of San Antonio shows her support for President Barack Obama with her manicure during the 2012 Texas Democratic Party State Convention at the George R. Brown Convention Center in Houston on Friday, June 8, 2012. less

Verna Blackwell of San Antonio shows her support for President Barack Obama with her manicure during the 2012 Texas Democratic Party State Convention at the George R. Brown Convention Center in Houston on ... more

Photo: Smiley N. Pool, Houston Chronicle

Verna Blackwell of San Antonio shows her support for President... Photo-3046541.44138 - Houston Chronicle

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Delegates wear stickers showing their support of party candidates during the 2012 Texas Democratic Party State Convention at the George R. Brown Convention Center in Houston on Friday, June 8, 2012.

Delegates wear stickers showing their support of party candidates during the 2012 Texas Democratic Party State Convention at the George R. Brown Convention Center in Houston on Friday, June 8, 2012.

Photo: Smiley N. Pool, Houston Chronicle

Delegates wear stickers showing their support of party candidates... Photo-3046542.44138 - Houston Chronicle

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Taboola Gallery Frame Item-85307.44138 - Houston Chronicle

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Signs form the backdrop of the Obama for America table during the 2012 Texas Democratic Party State Convention at the George R. Brown Convention Center in Houston on Friday, June 8, 2012.

Signs form the backdrop of the Obama for America table during the 2012 Texas Democratic Party State Convention at the George R. Brown Convention Center in Houston on Friday, June 8, 2012.

Photo: Smiley N. Pool, Houston Chronicle

Signs form the backdrop of the Obama for America table during the... Photo-3046543.44138 - Houston Chronicle

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Ozzie Williams of Houston listens to speakers during a session titled "It's Our Time: A Conversation for The Young, The Motivated, The Now" during the 2012 Texas Democratic Party State Convention at the George R. Brown Convention Center in Houston on Friday, June 8, 2012. less

Ozzie Williams of Houston listens to speakers during a session titled "It's Our Time: A Conversation for The Young, The Motivated, The Now" during the 2012 Texas Democratic Party State Convention at the George ... more

A delegate looks at t-shirts at a vendor stand during the 2012 Texas Democratic Party State Convention at the George R. Brown Convention Center in Houston on Friday, June 8, 2012.

A delegate looks at t-shirts at a vendor stand during the 2012 Texas Democratic Party State Convention at the George R. Brown Convention Center in Houston on Friday, June 8, 2012.

Photo: Smiley N. Pool, Houston Chronicle

A delegate looks at t-shirts at a vendor stand during the 2012... Photo-3046545.44138 - Houston Chronicle

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Houston Baptist University student Jonathan Evens participates in the conversation via Twitter as other participants line up at a microphone in the background to ask in-person questions during a session titled "It's Our Time: A Conversation for The Young, The Motivated, The Now" during the 2012 Texas Democratic Party State Convention at the George R. Brown Convention Center in Houston on Friday, June 8, 2012. less

Houston Baptist University student Jonathan Evens participates in the conversation via Twitter as other participants line up at a microphone in the background to ask in-person questions during a session titled ... more

Rapper Bun B casts a shadow on the wall as he addresses a session titled "It's Our Time: A Conversation for The Young, The Motivated, The Now," during the 2012 Texas Democratic Party State Convention at the George R. Brown Convention Center in Houston on Friday, June 8, 2012. less

Rapper Bun B casts a shadow on the wall as he addresses a session titled "It's Our Time: A Conversation for The Young, The Motivated, The Now," during the 2012 Texas Democratic Party State Convention at the ... more